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Saint John August Weather

Averages and records for weather in Saint John, New Brunswick in the month of August.

Typical Saint John August Weather 1991–2020
Average daily high	23.0 °C
Average daily low	11.2 °C
Average monthly precipitation	7.8 cm
Average monthly snow	none
Daily chance of precipitation	32.3%
Daily chance of snow	0%

Saint John August Weather Records 1871–2024
Highest temperature	34.4 °C	August 22, 1976
Lowest temperature	-0.6 °C	August 30, 1947
Highest daily low	19.6 °C	August 21, 2015
Lowest daily high	11.1 °C	August 25, 1873
Hottest average high temperature	24.9 °C	2018
Coldest average high temperature	18.3 °C	1912
Most daily precipitation	12.5 cm	August 2, 1970
Most monthly precipitation	26.5 cm	1922
Most daily snow	none	-
Most monthly snow	none	-

Note: Daily averages are a moving average which includes 14 days before and after

Day	Average (°C)		Record (°C)
Day	High	Low	High	Low
August 1	23.5	11.8	31.2	5.5
August 2	23.4	11.8	33.3	3.3
August 3	23.4	11.8	30.4	2.8
August 4	23.4	11.8	30.1	6.7
August 5	23.3	11.8	29.8	6.2
August 6	23.3	11.8	31.2	5.0
August 7	23.3	11.7	29.4	6.4
August 8	23.3	11.7	30.0	5.0
August 9	23.3	11.6	31.3	3.9
August 10	23.2	11.5	31.0	3.9
August 11	23.2	11.4	30.6	4.3
August 12	23.2	11.3	28.4	5.0
August 13	23.1	11.2	29.7	4.4
August 14	23.1	11.2	30.0	3.7
August 15	23.0	11.2	30.0	4.4
August 16	22.9	11.2	31.1	1.1
August 17	22.9	11.1	32.2	2.2
August 18	22.8	11.0	29.4	4.9
August 19	22.7	10.8	30.0	3.0
August 20	22.7	10.7	29.4	5.1
August 21	22.6	10.7	30.0	1.1
August 22	22.5	10.6	34.4	0.4
August 23	22.4	10.5	27.6	4.3
August 24	22.3	10.4	29.4	3.5
August 25	22.2	10.4	31.6	0.6
August 26	22.1	10.3	30.9	4.2
August 27	22.0	10.2	31.7	3.3
August 28	21.9	10.1	30.6	-0.6
August 29	21.7	9.9	30.0	2.8
August 30	21.6	9.8	31.3	-0.6
August 31	21.4	9.6	33.3	0.6

Weather Station Details

Years	Station	Coordinates
2012–2024	Saint John	location
1947–2012	Saint John A	location
1871–1946	Saint John	location